Ore-grinder



(No Model.) 2 Sheets8heet 1.

A. B PAIGE.

ORB GRINDER. N0. 304,125. Patented Aug. 26, 1884.

air 0 23E I u E1? W 2 Sheets-Sheet 2.

(No Model.)

A. B. PAIGE. ORB GRINDER.

No. 804,125. Patented Aug. 26, 1884.

mv a To all whom it rmty concern.-

UNI-TED STATES Parent rricn.

AUSTIN B. PAIGE, OF CHICAGO, ILLINOIS.

ORE-GRINDER.

SPECIFICATION forming part of Letters Patent No. 304,125, dated August26, 1884.

Application filed April 18, 1683. {No model.)

Be it known that I, AUSTIN B. PAIGE, of Chicago, in the county'of Cookand State of Illinois, have invented certain Improvements inOre-Grinders, of which the following is a specification, reference beingbad to the accompanying drawings, making a part of this specification.

Myinvention consists of a novel construction of ore-grinders, which willbe fully understood by the following description and claims.

In the accompanying drawings, Figure l is a vertical section of my mill.Fig. 2 is a plan view, part of the cover being cut away. Fig. 3 is avertical section of the mill, the parts being separated a little inorder better to show the parts, the cover, hopper, and uppergrinding-plate being shown at the top, the shaft, runner, and pulley inthe middle, and at the bottom a section of the gutter which surroundsthe runner when the mill is put together. Fig. 4 is a plan view of therunner, a portion of the same being broken away. Fig. 5 is a plan viewof the gutter. Fig. 6 is a side view of the bridgetree detached from themill. Fig. 7 is an end view of the bridge-tree, showing also thecross-shaft with thehand-wheel keyed thereto and the worm-wheels used inraising and lowering the bridge-tree.

Upon a suitable frame, A, Fig. 1, is the bridge-tree I and tram-pot I,supporting the shaft B, which carries the runner D, pulley C, and therevolving grinding-plate H, the runner and pulley being keyed to theshaft and the plateH bolted to the runner. This runnerD is cast with acentral hole to fit the vertical shaft B, and with an'annular flange orshoulder, at, to embrace the circumference of the grindingplate H, andalso with a high vertical rim, D, completely surrounding bothgrindingplates, and rising above the upper grindingplate, G, and thencurving over outwardly and extend ing downward in a wide droopingdischarginglip, D, which travels in gutter F. By this construction alarge annular revolving chamber, N, is formed outside of thegrinding-plates, which chamber, being supplied with water, serves towash and thus concentrate the more valuable portions of the pulp, whilethelighter refuse is carried off by the overflow into the gutter F.

On the upper part of the frame A is fastened the cover E, having thehopper M cast in the same piece therewith, and provided with a suitablebearing for the upper end of the shaft B. The stationary grinding-plateG is bolted to the under side of the cover. Both of the grindingplatesare cast with a series of recesses or cells, forming thegrindingsurfaccs, as shown at Q, Fig. 2, a vertical section of a portionof the upper plate being shown detached in the same figure. The depth ofthese cells is indicated by the said fragmentary section. The wholegrinding-surface of the grindingplates is made up of thesecell-partitions, as indicated in the main view, Fig. 2. Any convenientform may be given to the cells, rectangular or hexagonal, likehoneycomb, for instance.

For the purpose of raising and lowering the bridgetree and runner, thehorizontal shaft K is employed. This shaft is provided with worms whichmesh with toothed wheels W on screws L, which, being operated, raise andlower the bridge-tree, and also the shaft B and runner D, in the usualmanner.

Attached to the frame, and surrounding both grinding-plates, is agutter, F, having an internal lip, D, rising above the runner, and intowhich the overflow from the grindingplates is discharged over lip D, asindicated by arrows in Fig. 3. This gutter has a series ofdischarge-openings,f, and the overhanging lip D of the runner, bytraveling in this gutter, agitates and washes the pulp therein as it comes from the mill with the constant overflow of water, thereby separatingand retaining within the gutter particles of the ore. The cover E hastwo or more inlets, P, for the in troduction of a constantsupply ofwater to said chamber; also, the cover E has two or more steam pipes orinlets, O, passing through the same and through the stationarygrindingplate attached thereto, and terminating in the grinding-cells Qon the face of said plate, for the purpose of carrying steam between thegrinding-plates, and thus heating the ore as it is being ground. Themanner in which these steam-jets are discharged between thegrinding-plates is shown in Fig. 3.

The ore is fed into the hopper M andwet by a small quantity of water,and the ground ore passes from the grinding-plates into the chamber N,which is more fully described in a separate application for a patent foran improvemend n amalgamators. This chamber is supplied with sufficientwater to sluice the pulticles of metal remain, the lighter materialbeand renewed when worn out.

in g furtherseparatedtherefrom and carried off with the water. Thepresence of steam heat, together with the electricity generated by thegrinding-plates, produces a powerful chemical action, generatingsulphide of hydrogen whenever sulphur or any of its combinations ispresent.

The principal wear of the mill is on the grinding-plates, which can beeasily unbolted The dress of these plates must be modified according tothe kind of ore to be ground, whether hard or soft,

brittle or tough, or otherwise, and the lead. or.

draft of the dress must be varied to suit the quality of the ore. Theplates are to be made of the best iron employed for making carwheels,and they are cast about two or three inches in thickness, including thedress Q, the faces of the plates being chilled, while the back is leftsoft, thus combining durability with strength. I r

In my mill the grinding and amalgamating are continuous, and to acertain extent the same devices enter into both the ore-grinder(including the sluicing an d scparati on by washing) and theamalgamator, for which I have made application for a separate patentdated July 6, 1883, N 0. 100,116.

The mill does not require to be stopped for the purpose of being chargedor discharged, or for replenishing the chamber N with mercury.

. The vertical recesses R on the interior of the rim D are intended tohold mercuryin a V61? tical sheet, as more fully described in theseparate application for an amalgamator above referrcd to.

' Having described my invention, what I 5 claim is- 1. In anore-grinding mill, the combination of the stationary cover E, providedwith a cellular grindingplate, G, and water-inlets P, shaft B, andrunner D, )rovided with the cellular grindingplate H, and annularchamber N, surrounding the grinding-plates of the said cover and runner,substantially as and for the purpose herein specified.

2. The combination of the stationary cover 5 5 E, provided withwater-inlets I, the runner D, provided with an annularreceiving-chamber, N, having rim D, and the grinding-plates, the saidannular rim D forming the outside of the chamber N, and extendingabovethe 60 general surface of the cover E, substantially as hereinspecified.

3. The combination of the stationary cover E, provided with water-inletsP, the runner D, provided with an annular chamber, N, having rim D, andthe grinding-plates, said annular rim D having a downwardly-dipping lip,D, and the annular gutter F, surrounding the rim D" and receiving thelip D, substantially as and for the purpose herein specified.

4. The combination of the stationary cover E, having a grindingplate, G,the runner D, having a grinding-plate, H, and two or more steam-pipes, OO, substantially as herein described, whereby steam is admitted betweenthe grinding-plates While the grinding is being done, for the purposeherein specified.

AUSTIN B. PAIGE.

lVitn esses:

DANIEL BREED, Issac T. GIBSON.

